Sintered silica aerogel: a host matrix for long life nuclear wastes

Liquid adsorption of basic dye using silica aerogels with different textural properties

“…Woignier et al investigated the effect of the porous network features of silica aerogel on the ability of the material to soak up long life nuclear wastes. Neodymium and cerium oxides were used to simulate the actinide oxides in the nuclear wastes [5,6]. Wang et al [7] investigated the dynamic adsorption of methylene blue (MB) on mesoporous silica with different structures.…”

Microstructure and leaching durability of glass composite wasteforms for spent clinoptilolite immobilisation

“…Several terminologies have been used in describing the end monolithic wasteform of a glass composite. Typical terms used are: glass bonded wasteform [2], ceramic wasteform [3], sintered glass [4], hot pressed glass matrix composite [5], reaction sintered glass [6], glass encapsulated wasteform [7], sintered aerogel [8], vitreous ceramic [9], glassy slag [10], glass ceramic [11] and glass-like material [12]. Much of these different terminologies have arisen from the different routes of producing the final glass composite or are related to the end features of the wasteform microstructure.…”

Borosilicate and lead silicate glass matrix composites containing pyrochlore phases for nuclear waste encapsulation

“…With the aim of exploiting both the advantages of glass waste forms and the radiation resistance of certain crystalline phases, waste forms based on composite materials containing ceramic and glass phases, or on specifically designed glass-ceramics, have been proposed for the immobilization of different types of radioactive waste [14][15][16][17][18][19], with some early concepts summarised in Refs. [20,21].…”

“…lanthanides and actinides) becoming incorporated in the zirconolite phase. French researchers [17] have recently proposed a sol-gel derived high silica glass as a host matrix for actinides. The incorporation of wastes in a silica matrix was used also at the Catholic University in the USA [18], by capillary infiltration of liquid waste through a highly porous host structure.…”